GRAMMY Award-winners, friends and collaborators Lee Ann Womack and Patty Griffin are teaming up for a 7-date tour this July. The co-headlined bill, titled “An Acoustic Evening with Patty Griffin & Lee Ann Womack” promises a rare and rousing night of music performed by two of the most esteemed singers and songwriters in American music. Each night, Lee Ann and Patty will play their own sets and share the stage for special duet performances.